The replication data set contains the following files:

Cross_Sec.xlsx: Cross-sectional party data on disproportionality (last election MR/first election PR)

Districts.xlsx: Data on the distribution of districts with magnitude for different PR systems

Districts_Time_Series.xlsx: Data on the evolution of effective electoral thresholds for multiple countries (late 19th - early 21th century)

FE_data.csv: District data for multiple reforms in Denmark/Germany/Norway

FE2_data.csv: District data for multiple reforms in Denmark (without Copenhagen)/Germany/Norway

Main_data.csv: Cross-sectional district data

Replication.R: File with code to produce tables/figures 
 